Thanks Gareth, sounds good. Unfortunately due to my status as an “enthusiastic amateur” I can’t really spend $80 on something I would maybe only use on one song. I was actually looking for children singing, something with this kind of vibe - https://www.freesound.org/people/LukeIRL/sounds/176088/
That isn’t actually African but it has the right vibe to it. 
I doubt I’ll really be able to find anything much better, but the track works quite well without vocals anyway.